"We're starting to get to the point where we're seeing the light at the end of the tunnel on getting a lot of our guys back, and Yuni's the first one," manager Ned Yost said.
Starter Jonathan Sanchez (left biceps tendinitis) could return after one more start for Triple-A Omaha. Reliever Everett Teaford (lower abdominal strain) pitched in game-situation batting practice on Friday and is likely to begin a rehab assignment next week.
Second baseman Chris Getz (left ribcage contusion) is taking batting practice and is also getting close to Minor League rehab assignment.
Center fielder Lorenzo Cain (torn left hip flexor) and catcher Salvador Perez (left knee surgery) are playing at the Surprise, Ariz., camp and are expected to get injury rehab assignments late next week. Catcher Manny Pina (right knee surgery) is also progressing in Arizona.
Three pitchers, Joakim Soria, Danny Duffy and Blake Wood, are out for the year because of Tommy John surgery.